Make sure SkDrawLooper objects can only be allocated on the heap.

gm/blurroundrect.cpp

 /*
 * Copyright 2013 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #include "gm.h"
 #include "SkBlurMask.h"
 #include "SkBlurMaskFilter.h"
@@ skipping 35 matching lines @@
     virtual SkString onShortName() SK_OVERRIDE {
         return fName;
     }
 
     virtual SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(SkScalarCeilToInt(fRRect.rect().width()),
                              SkScalarCeilToInt(fRRect.rect().height()));
     }
 
     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
-        SkLayerDrawLooper* looper = new SkLayerDrawLooper;
+        SkLayerDrawLooper::Builder looperBuilder;
         {
             SkLayerDrawLooper::LayerInfo info;
             info.fPaintBits = SkLayerDrawLooper::kMaskFilter_Bit
                               | SkLayerDrawLooper::kColorFilter_Bit;
             info.fColorMode = SkXfermode::kSrc_Mode;
             info.fOffset = SkPoint::Make(SkIntToScalar(-1), SkIntToScalar(0));
             info.fPostTranslate = false;
-            SkPaint* paint = looper->addLayerOnTop(info);
+            SkPaint* paint = looperBuilder.addLayerOnTop(info);
             SkMaskFilter* maskFilter = SkBlurMaskFilter::Create(
                     SkBlurMaskFilter::kNormal_BlurStyle,
                     SkBlurMask::ConvertRadiusToSigma(SK_ScalarHalf),
                     SkBlurMaskFilter::kHighQuality_BlurFlag);
             paint->setMaskFilter(maskFilter)->unref();
             SkColorFilter* colorFilter = SkColorFilter::CreateModeFilter(SK_ColorLTGRAY,
                     SkXfermode::kSrcIn_Mode);
             paint->setColorFilter(colorFilter)->unref();
             paint->setColor(SK_ColorGRAY);
         }
         {
             SkLayerDrawLooper::LayerInfo info;
-            looper->addLayerOnTop(info);
+            looperBuilder.addLayerOnTop(info);
         }
         SkPaint paint;
         canvas->drawRect(fRRect.rect(), paint);
 
-        paint.setLooper(looper)->unref();
+        paint.setLooper(looperBuilder.detachLooper())->unref();
         paint.setColor(SK_ColorCYAN);
         paint.setAntiAlias(true);
 
         canvas->drawRRect(fRRect, paint);
     }
 
 private:
     SkString        fName;
     SkRRect         fRRect;
 
@@ skipping 51 matching lines @@
 // TODO(scroggo): Disabled in an attempt to rememdy
 // https://code.google.com/p/skia/issues/detail?id=1801 ('Win7 Test bots all failing GenerateGMs:
 // ran wrong number of tests')
 //DEF_GM(return new BlurRoundRectGM(600, 5514, 6);)
 
 // Rounded rect with two opposite corners with large radii, the other two
 // small.
 DEF_GM(return new BlurRoundRectGM(100, 100);)
 
 DEF_GM(return new SimpleBlurRoundRectGM();)